Fig. 4: Phase diagram of octahedrally coordinated TaS2.
From: Endotaxial stabilization of 2D charge density waves with long-range order
a Schematic temperature vs. disorder phase diagram of octahedrally coordinated TaS2. As extrinsic disorder (σ) decreases, more ordered CDW phases are stabilized. At room temperature, polytype heterostructures with low disorder stabilize C-CDW (d) instead of NC-CDW (f), and long-range ordered IC-CDW (c) phase instead of hexatically disordered IC-CDW (e). Furthermore, it stabilizes CDWs (b) at higher temperatures than bulk 1T-TaS2 can (TCDW ≅ 540 K52). Substitutional disorder, on the other hand, destroys long-range order and hexatic IC-CDW is stable at room temperature (h) and leads to complete destruction of CDW eventually (i). b–i Electron diffraction patterns showing superlattice peaks around a single Bragg peak reveal the charge ordering states. h, i are adapted from Wilson et al.24.
